EUVD-2026-62507
GHSA-63v3-36f6-6w34
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only vector confirmed by description; low privilege sufficient; no user interaction; full CIA impact via privilege escalation to system context.
Primary rating from Vendor (dell).
CVSS VectorVendor: dell
Lifecycle Timeline
3DescriptionCVE.org
Dell Command Update (DCU), versions prior to 5.7.1, contain a Deserialization of Untrusted Data vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Elevation of Privileges.
AnalysisAI
Elevation of privilege via deserialization of untrusted data affects Dell Command Update (DCU) versions prior to 5.7.1 on local systems. A low-privileged local attacker can exploit unsafe deserialization to execute arbitrary code at a higher privilege level, potentially gaining full system control. No public exploit code or active exploitation has been identified at time of analysis, but the high CVSS score and straightforward attack complexity make this a meaningful patching priority for enterprise fleets.
Technical ContextAI
Dell Command Update (DCU) is a Windows utility that manages driver, firmware, and BIOS updates for Dell client systems. The vulnerability is rooted in CWE-502 (Deserialization of Untrusted Data), a class of flaw where an application deserializes data from an attacker-controllable source without adequate type or integrity validation. Deserializing crafted payloads can redirect control flow during object reconstruction, enabling arbitrary code execution in the context of the deserializing process. The CPE string cpe:2.3:a:dell:dell_command_update_(dcu):*:*:*:*:*:*:*:* indicates all DCU versions up to but not including 5.7.1 are affected. Because DCU typically runs with elevated privileges to perform system-level updates, a successful exploit by a low-privileged user results in privilege escalation to SYSTEM or administrator level.
RemediationAI
The primary remediation is upgrading Dell Command Update to version 5.7.1 or later, which is the fix version indicated by this advisory. The Dell advisory DSA-2026-309 at https://www.dell.com/support/kbdoc/en-us/000501378/dsa-2026-309-security-update-for-dell-command-update-for-multiple-vulnerabilities should be consulted for official installation guidance and any additional patches. Organizations that cannot immediately patch should consider restricting local user account privileges on systems running DCU to reduce the pool of potential attackers, and should monitor for unexpected process creation or privilege escalation events originating from DCU processes. Uninstalling DCU temporarily is a viable compensating control if updates can be managed through an alternative mechanism, though this removes Dell's driver update capability for the duration.
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Same weakness CWE-502 – Deserialization of Untrusted Data
View allSame technique Deserialization
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External POC / Exploit Code
Leaving vuln.today